In the Australian bush in the 19th century people had to improvise. The Billy Can is a tin, with handles, usually used to carry water.

1 1/2 cups of raisins
1/2 cup of sultanas and raisins
1 cup sugar
1/2 teaspoon of mixed spice and cinnamon
2 cups flour
1 teaspoon of bicarbonate soda

Combine all ingredients. Mix well with 500 mls of boiling tea. Empty into a greased and floured billy can. Cover, amd let it stand overnight. Steam for 3 1/2 hours.